Double Star Calculator - Orbit

Orbital Elements for A1903AB

WDS:	A1903AB	WDS ID/Discoverer
P:	143.400	Orbital period (years)
a:	0.354	Semi-major axis (arcseconds)
i:	20.4	Inclination (degrees)
Ω:	145.0	Longitude of ascending node (degrees)
T:	1957.000	Epoch of periastron passage (year)
e:	0.225	Eccentricity
ω:	84.0	Longitude of periastron (degrees)
Start-Year:	1953.3	Year
End-Year:	2096.7	Year
Epoch:	2026.5	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for A1903AB
Position:	005935.07-011130.5	Epoch-2000 right ascension and declination
WDS-ID:	00596-0111	WDS designation
Discoverer Code:	A1903AB	Discover designation and components
ADS number:	822	Aitken Double Star catalog
HD number:	5805	HD catalog number
Hipparcos number:	4641	Hipparcos catalog number
V1:	9.28	Magnitude of the primary
V2:	9.94	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	2008	Date of last observation
Orbit grade:	3	Orbit grade, ranging from : 1 = Definitive 2 = Good 3 = Reliable 4 = Preliminary 5 = Indeterminate
Flags:	n	Flags
Ephemerides:		Ephemerides
Code:	Hrt2010a	Reference

Double Star Orbit for A1903AB

WDS 6th Orbit including measures of A1903AB

-- Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements) --

Legend:

Green plus signs:	Visual (micrometric) measures
Violet asterisks:	Photographic measures
Blue symbols:	Various interferometric techniques
Dot-dash line:	Indicates the line of nodes

Ephemeris of A1903AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2026.50    0.407    44.78
--------------------------
1953.30    0.261   212.72
1954.30    0.260   216.96
1955.30    0.258   221.25
1956.30    0.258   225.57
1957.30    0.257   229.90
1958.30    0.257   234.24
1959.30    0.258   238.58
1960.30    0.259   242.88
1961.30    0.260   247.15
1962.30    0.262   251.38
1963.30    0.264   255.54
1964.30    0.266   259.64
1965.30    0.269   263.65
1966.30    0.272   267.58
1967.30    0.275   271.43
1968.30    0.278   275.18
1969.30    0.282   278.84
1970.30    0.286   282.40
1971.30    0.290   285.87
1972.30    0.294   289.24
1973.30    0.298   292.52
1974.30    0.302   295.72
1975.30    0.306   298.82
1976.30    0.310   301.85
1977.30    0.314   304.79
1978.30    0.319   307.66
1979.30    0.323   310.45
1980.30    0.327   313.18
1981.30    0.331   315.84
1982.30    0.334   318.43
1983.30    0.338   320.97
1984.30    0.342   323.46
1985.30    0.345   325.89
1986.30    0.349   328.27
1987.30    0.352   330.61
1988.30    0.356   332.90
1989.30    0.359   335.16
1990.30    0.362   337.37
1991.30    0.365   339.55
1992.30    0.367   341.69
1993.30    0.370   343.80
1994.30    0.373   345.89
1995.30    0.375   347.94
1996.30    0.378   349.97
1997.30    0.380   351.97
1998.30    0.382   353.95
1999.30    0.384   355.91
2000.30    0.386   357.85
2001.30    0.388   359.77
2002.30    0.389     1.67
2003.30    0.391     3.56
2004.30    0.393     5.43
2005.30    0.394     7.29
2006.30    0.395     9.13
2007.30    0.397    10.96
2008.30    0.398    12.78
2009.30    0.399    14.59
2010.30    0.400    16.39
2011.30    0.401    18.18
2012.30    0.402    19.97
2013.30    0.403    21.74
2014.30    0.403    23.51
2015.30    0.404    25.27
2016.30    0.405    27.03
2017.30    0.405    28.78
2018.30    0.406    30.53
2019.30    0.406    32.28
2020.30    0.406    34.02
2021.30    0.407    35.76
2022.30    0.407    37.50
2023.30    0.407    39.23
2024.30    0.407    40.97
2025.30    0.407    42.70
2026.30    0.407    44.44
2027.30    0.407    46.17
2028.30    0.407    47.91
2029.30    0.407    49.64
2030.30    0.406    51.38
2031.30    0.406    53.12
2032.30    0.406    54.87
2033.30    0.405    56.61
2034.30    0.405    58.36
2035.30    0.405    60.11
2036.30    0.404    61.87
2037.30    0.403    63.63
2038.30    0.403    65.40
2039.30    0.402    67.17
2040.30    0.401    68.95
2041.30    0.401    70.74
2042.30    0.400    72.53
2043.30    0.399    74.33
2044.30    0.398    76.14
2045.30    0.397    77.96
2046.30    0.396    79.79
2047.30    0.395    81.62
2048.30    0.394    83.47
2049.30    0.393    85.33
2050.30    0.391    87.20
2051.30    0.390    89.08
2052.30    0.389    90.98
2053.30    0.387    92.89
2054.30    0.386    94.81
2055.30    0.384    96.75
2056.30    0.382    98.71
2057.30    0.381   100.69
2058.30    0.379   102.68
2059.30    0.377   104.69
2060.30    0.375   106.73
2061.30    0.373   108.79
2062.30    0.371   110.87
2063.30    0.368   112.97
2064.30    0.366   115.10
2065.30    0.363   117.26
2066.30    0.361   119.45
2067.30    0.358   121.68
2068.30    0.356   123.93
2069.30    0.353   126.22
2070.30    0.350   128.55
2071.30    0.347   130.91
2072.30    0.344   133.32
2073.30    0.341   135.78
2074.30    0.337   138.28
2075.30    0.334   140.83
2076.30    0.330   143.43
2077.30    0.327   146.09
2078.30    0.323   148.81
2079.30    0.320   151.59
2080.30    0.316   154.44
2081.30    0.312   157.35
2082.30    0.308   160.34
2083.30    0.304   163.40
2084.30    0.300   166.55
2085.30    0.297   169.77
2086.30    0.293   173.09
2087.30    0.289   176.48
2088.30    0.285   179.97
2089.30    0.282   183.55
2090.30    0.278   187.22
2091.30    0.275   190.98
2092.30    0.272   194.83
2093.30    0.269   198.77
2094.30    0.266   202.79
2095.30    0.264   206.88
2096.30    0.262   211.04

Disclaimer

This result is provided without warranty. For all terms, see the Full Disclaimer. Copyright (C) 2025. Unless otherwise noted, all output generated by the Double Star Calculator including orbit diagrams, ephemerides, and analytical reports is licensed under CC BY 4.0.

Acknowledgements

The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory.

Report Information

Double Star Calculator:		Version 1.2 ($Rev: 2397 $)
Report created:		2026-06-25 14:45:49